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https://issues.apache.org/jira/browse/LUCENE-10409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17489464#comment-17489464
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Adrien Grand commented on LUCENE-10409:
---------------------------------------
Hi [~gf2121], I don't know what "Task" means either. :) I haven't planned to
work on it, feel free to take it!
> Improve BKDWriter's DocIdsWriter to better encode decreasing sequences of doc
> IDs
> ---------------------------------------------------------------------------------
>
> Key: LUCENE-10409
> URL: https://issues.apache.org/jira/browse/LUCENE-10409
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Adrien Grand
> Priority: Minor
>
> [~gf2121] recently improved DocIdsWriter for the case when doc IDs are dense
> and come in the same order as values via the CONTINUOUS_IDS and BITSET_IDS
> encodings.
> We could do the same for the case when doc IDs come in the opposite order to
> values. This would be used whenever searching on a field that is used for
> index sorting in the descending order. This would be a frequent case for
> Elasticsearch users as we're planning on using index sorting more and more on
> time-based data with a descending sort on the timestamp as the last sort
> field.
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